lustre/llite/super25.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Lustre Light Super operations
   5  *
   6  * This code is issued under the GNU General Public License.
   7  * See the file COPYING in this distribution
   8  *
   9  * Copryright (C) 2002 Cluster File Systems, Inc.
  10  */
  11
  12 #define DEBUG_SUBSYSTEM S_LLITE
  13
  14 #include <linux/module.h>
  15 #include <linux/random.h>
  16 #include <linux/version.h>
  17 #include <linux/lustre_lite.h>
  18 #include <linux/lustre_ha.h>
  19 #include <linux/lustre_dlm.h>
  20 #include <linux/init.h>
  21 #include <linux/fs.h>
  22 #include <linux/lprocfs_status.h>
  23
  24 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
  25 kmem_cache_t *ll_file_data_slab;
  26 extern struct address_space_operations ll_aops;
  27 extern struct address_space_operations ll_dir_aops;
  28 struct super_operations ll_super_operations;
  29
  30 extern int ll_init_inodecache(void);
  31 extern void ll_destroy_inodecache(void);
  32 extern int ll_recover(struct recovd_data *, int);
  33 extern int ll_commitcbd_setup(struct ll_sb_info *);
  34 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
  35 int ll_read_inode2(struct inode *inode, void *opaque);
  36
  37 extern void ll_proc_namespace(struct super_block* sb, char* osc, char* mdc)
  38
  39 static char *ll_read_opt(const char *opt, char *data)
  40 {
  41         char *value;
  42         char *retval;
  43         ENTRY;
  44
  45         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  46         if ( strncmp(opt, data, strlen(opt)) )
  47                 RETURN(NULL);
  48         if ( (value = strchr(data, '=')) == NULL )
  49                 RETURN(NULL);
  50
  51         value++;
  52         OBD_ALLOC(retval, strlen(value) + 1);
  53         if ( !retval ) {
  54                 CERROR("out of memory!\n");
  55                 RETURN(NULL);
  56         }
  57
  58         memcpy(retval, value, strlen(value)+1);
  59         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
  60         RETURN(retval);
  61 }
  62
  63 static int ll_set_opt(const char *opt, char *data, int fl)
  64 {
  65         ENTRY;
  66
  67         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  68         if ( strncmp(opt, data, strlen(opt)) )
  69                 RETURN(0);
  70         else
  71                 RETURN(fl);
  72 }
  73
  74 static void ll_options(char *options, char **ost, char **mds, int *flags)
  75 {
  76         char *opt_ptr = options;
  77         char *this_char;
  78         ENTRY;
  79
  80         if (!options) {
  81                 EXIT;
  82                 return;
  83         }
  84
  85         while ((this_char = strsep (&opt_ptr, ",")) != NULL) {
  86                 CDEBUG(D_SUPER, "this_char %s\n", this_char);
  87                 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
  88                      (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
  89                      (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) |
  90                       ll_set_opt("nolock", this_char, LL_SBI_NOLCK))) )
  91                         continue;
  92         }
  93         EXIT;
  94 }
  95
  96 #ifndef log2
  97 #define log2(n) ffz(~(n))
  98 #endif
  99
 100
 101 static int ll_fill_super(struct super_block *sb, void *data, int silent)
 102 {
 103         struct inode *root = 0;
 104         struct obd_device *obd;
 105         struct ll_sb_info *sbi;
 106         char *osc = NULL;
 107         char *mdc = NULL;
 108         int err;
 109         struct ll_fid rootfid;
 110         struct obd_statfs osfs;
 111         struct ptlrpc_request *request = NULL;
 112         struct ptlrpc_connection *mdc_conn;
 113         struct ll_read_inode2_cookie lic;
 114         class_uuid_t uuid;
 115
 116         ENTRY;
 117         MOD_INC_USE_COUNT;
 118
 119         OBD_ALLOC(sbi, sizeof(*sbi));
 120         if (!sbi) {
 121                 MOD_DEC_USE_COUNT;
 122                 RETURN(-ENOMEM);
 123         }
 124
 125         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 126         generate_random_uuid(uuid);
 127         class_uuid_unparse(uuid, sbi->ll_sb_uuid);
 128
 129         sb->s_fs_info = sbi;
 130
 131         ll_options(data, &osc, &mdc, &sbi->ll_flags);
 132
 133         if (!osc) {
 134                 CERROR("no osc\n");
 135                 GOTO(out_free, sb = NULL);
 136         }
 137
 138         if (!mdc) {
 139                 CERROR("no mdc\n");
 140                 GOTO(out_free, sb = NULL);
 141         }
 142
 143         obd = class_uuid2obd(mdc);
 144         if (!obd) {
 145                 CERROR("MDC %s: not setup or attached\n", mdc);
 146                 GOTO(out_free, sb = NULL);
 147         }
 148
 149         err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid,
 150                           ptlrpc_recovd, ll_recover);
 151         if (err) {
 152                 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
 153                 GOTO(out_free, sb = NULL);
 154         }
 155
 156 #warning Peter: is this the right place to raise the connection level?
 157         mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
 158         mdc_conn->c_level = LUSTRE_CONN_FULL;
 159         list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
 160
 161         obd = class_uuid2obd(osc);
 162         if (!obd) {
 163                 CERROR("OSC %s: not setup or attached\n", osc);
 164                 GOTO(out_mdc, sb = NULL);
 165         }
 166
 167         err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid,
 168                           ptlrpc_recovd, ll_recover);
 169         if (err) {
 170                 CERROR("cannot connect to %s: rc = %d\n", osc, err);
 171                 GOTO(out_mdc, sb = NULL);
 172         }
 173
 174         err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 175         if (err) {
 176                 CERROR("cannot mds_connect: rc = %d\n", err);
 177                 GOTO(out_mdc, sb = NULL);
 178         }
 179         CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
 180         sbi->ll_rootino = rootfid.id;
 181
 182         memset(&osfs, 0, sizeof(osfs));
 183         err = mdc_statfs(&sbi->ll_mdc_conn, &osfs);
 184         sb->s_blocksize = osfs.os_bsize;
 185         sb->s_blocksize_bits = log2(osfs.os_bsize);
 186         sb->s_magic = LL_SUPER_MAGIC;
 187         sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
 188
 189         sb->s_op = &ll_super_operations;
 190
 191         /* make root inode */
 192         err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
 193                           OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
 194         if (err) {
 195                 CERROR("mdc_getattr failed for root: rc = %d\n", err);
 196                 GOTO(out_request, sb = NULL);
 197         }
 198
 199         /* initialize committed transaction callback daemon */
 200         spin_lock_init(&sbi->ll_commitcbd_lock);
 201         init_waitqueue_head(&sbi->ll_commitcbd_waitq);
 202         init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
 203         sbi->ll_commitcbd_flags = 0;
 204         err = ll_commitcbd_setup(sbi);
 205         if (err) {
 206                 CERROR("failed to start commit callback daemon: rc = %d\n",err);
 207                 GOTO(out_request, sb = NULL);
 208         }
 209
 210         lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
 211         lic.lic_lmm = NULL;
 212         root = iget5_locked(sb, sbi->ll_rootino, NULL,
 213                             ll_read_inode2, &lic);
 214
 215         if (root) {
 216                 sb->s_root = d_alloc_root(root);
 217         } else {
 218                 CERROR("lustre_lite: bad iget4 for root\n");
 219                 GOTO(out_cdb, sb = NULL);
 220         }
 221
 222         ptlrpc_req_finished(request);
 223         request = NULL;
 224         ll_proc_namespace(sb, osc, mdc)
 225 out_dev:
 226         if (mdc)
 227                 OBD_FREE(mdc, strlen(mdc) + 1);
 228         if (osc)
 229                 OBD_FREE(osc, strlen(osc) + 1);
 230
 231         RETURN(0);
 232
 233 out_cdb:
 234         ll_commitcbd_cleanup(sbi);
 235 out_request:
 236         ptlrpc_req_finished(request);
 237         obd_disconnect(&sbi->ll_osc_conn);
 238 out_mdc:
 239         obd_disconnect(&sbi->ll_mdc_conn);
 240 out_free:
 241         OBD_FREE(sbi, sizeof(*sbi));
 242
 243         MOD_DEC_USE_COUNT;
 244         goto out_dev;
 245 } /* ll_fill_super */
 246
 247 struct super_block * ll_get_sb(struct file_system_type *fs_type,
 248                                int flags, char *devname, void * data)
 249 {
 250         return get_sb_nodev(fs_type, flags, data, ll_fill_super);
 251 }
 252
 253 static void ll_put_super(struct super_block *sb)
 254 {
 255         struct ll_sb_info *sbi = ll_s2sbi(sb);
 256         struct ll_fid rootfid;
 257         ENTRY;
 258
 259         list_del(&sbi->ll_conn_chain);
 260         ll_commitcbd_cleanup(sbi);
 261         obd_disconnect(&sbi->ll_osc_conn);
 262
 263         /* NULL request to force sync on the MDS, and get the last_committed
 264          * value to flush remaining RPCs from the pending queue on client.
 265          *
 266          * XXX This should be an mdc_sync() call to sync the whole MDS fs,
 267          *     which we can call for other reasons as well.
 268          */
 269         mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 270
 271         lprocfs_dereg_mnt(sbi->ll_proc_root);
 272         sbi->ll_proc_root = NULL;
 273
 274         obd_disconnect(&sbi->ll_mdc_conn);
 275         OBD_FREE(sbi, sizeof(*sbi));
 276
 277         MOD_DEC_USE_COUNT;
 278         EXIT;
 279 } /* ll_put_super */
 280
 281 static void ll_clear_inode(struct inode *inode)
 282 {
 283         ENTRY;
 284
 285         if (atomic_read(&inode->i_count) == 0) {
 286                 struct ll_inode_info *lli = ll_i2info(inode);
 287                 char *symlink_name = lli->lli_symlink_name;
 288
 289                 if (lli->lli_smd)
 290                         obd_free_memmd(&sbi->ll_osc_conn, &lli->lli_smd);
 291                 if (symlink_name) {
 292                         OBD_FREE(symlink_name, strlen(symlink_name) + 1);
 293                         lli->lli_symlink_name = NULL;
 294                 }
 295         }
 296         EXIT;
 297 }
 298
 299 static void ll_delete_inode(struct inode *inode)
 300 {
 301         ENTRY;
 302         if (S_ISREG(inode->i_mode)) {
 303                 int err;
 304                 struct obdo *oa;
 305                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 306
 307                 if (!lsm)
 308                         GOTO(out, -EINVAL);
 309
 310                 if (lsm->lsm_object_id == 0) {
 311                         CERROR("This really happens\n");
 312                         /* No obdo was ever created */
 313                         GOTO(out, 0);
 314                 }
 315
 316                 oa = obdo_alloc();
 317                 if (oa == NULL)
 318                         GOTO(out, -ENOMEM);
 319
 320                 oa->o_id = lsm->lsm_object_id;
 321                 oa->o_mode = inode->i_mode;
 322                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLTYPE;
 323
 324                 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
 325                 obdo_free(oa);
 326                 CDEBUG(D_SUPER, "obd destroy of objid "LPX64" error %d\n",
 327                        lsm->lsm_object_id, err);
 328         }
 329 out:
 330         clear_inode(inode);
 331         EXIT;
 332 }
 333
 334 /* like inode_setattr, but doesn't mark the inode dirty */
 335 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
 336 {
 337         unsigned int ia_valid = attr->ia_valid;
 338         int error = 0;
 339
 340         if ((ia_valid & ATTR_SIZE) && trunc) {
 341                 error = vmtruncate(inode, attr->ia_size);
 342                 if (error)
 343                         goto out;
 344         } else if (ia_valid & ATTR_SIZE)
 345                 inode->i_size = attr->ia_size;
 346
 347         if (ia_valid & ATTR_UID)
 348                 inode->i_uid = attr->ia_uid;
 349         if (ia_valid & ATTR_GID)
 350                 inode->i_gid = attr->ia_gid;
 351         if (ia_valid & ATTR_ATIME)
 352                 inode->i_atime = attr->ia_atime;
 353         if (ia_valid & ATTR_MTIME)
 354                 inode->i_mtime = attr->ia_mtime;
 355         if (ia_valid & ATTR_CTIME)
 356                 inode->i_ctime = attr->ia_ctime;
 357         if (ia_valid & ATTR_MODE) {
 358                 inode->i_mode = attr->ia_mode;
 359                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 360                         inode->i_mode &= ~S_ISGID;
 361         }
 362 out:
 363         return error;
 364 }
 365
 366 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
 367 {
 368         struct ptlrpc_request *request = NULL;
 369         struct ll_sb_info *sbi = ll_i2sbi(inode);
 370         int err;
 371
 372         ENTRY;
 373
 374         /* change incore inode */
 375         ll_attr2inode(inode, attr, do_trunc);
 376
 377         err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
 378         if (err)
 379                 CERROR("mdc_setattr fails (%d)\n", err);
 380
 381         ptlrpc_req_finished(request);
 382
 383         RETURN(err);
 384 }
 385
 386 int ll_setattr(struct dentry *de, struct iattr *attr)
 387 {
 388         int rc = inode_change_ok(de->d_inode, attr);
 389
 390         if (rc)
 391                 return rc;
 392
 393         return ll_inode_setattr(de->d_inode, attr, 1);
 394 }
 395
 396 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
 397 {
 398         struct ll_sb_info *sbi = ll_s2sbi(sb);
 399         struct obd_statfs osfs;
 400         int rc;
 401         ENTRY;
 402
 403         memset(sfs, 0, sizeof(*sfs));
 404         rc = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 405         statfs_unpack(sfs, &osfs);
 406         if (rc)
 407                 CERROR("mdc_statfs fails: rc = %d\n", rc);
 408         else
 409                 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
 410                        " objects "LPU64"/"LPU64"\n",
 411                        osfs.os_bavail, osfs.os_blocks,
 412                        osfs.os_ffree, osfs.os_files);
 413
 414         /* temporary until mds_statfs returns statfs info for all OSTs */
 415         if (!rc) {
 416                 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
 417                 if (rc) {
 418                         CERROR("obd_statfs fails: rc = %d\n", rc);
 419                         GOTO(out, rc);
 420                 }
 421                 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
 422                        " objects "LPU64"/"LPU64"\n",
 423                        osfs.os_bavail, osfs.os_blocks,
 424                        osfs.os_ffree, osfs.os_files);
 425
 426                 while (osfs.os_blocks > ~0UL) {
 427                         sfs->f_bsize <<= 1;
 428
 429                         osfs.os_blocks >>= 1;
 430                         osfs.os_bfree >>= 1;
 431                         osfs.os_bavail >>= 1;
 432                 }
 433                 sfs->f_blocks = osfs.os_blocks;
 434                 sfs->f_bfree = osfs.os_bfree;
 435                 sfs->f_bavail = osfs.os_bavail;
 436                 if (osfs.os_ffree < (__u64)sfs->f_ffree)
 437                         sfs->f_ffree = osfs.os_ffree;
 438         }
 439
 440 out:
 441         RETURN(rc);
 442 }
 443
 444 void ll_update_inode(struct inode *inode, struct mds_body *body)
 445 {
 446         if (body->valid & OBD_MD_FLID)
 447                 inode->i_ino = body->ino;
 448         if (body->valid & OBD_MD_FLATIME)
 449                 inode->i_atime = body->atime;
 450         if (body->valid & OBD_MD_FLMTIME)
 451                 inode->i_mtime = body->mtime;
 452         if (body->valid & OBD_MD_FLCTIME)
 453                 inode->i_ctime = body->ctime;
 454         if (body->valid & OBD_MD_FLMODE)
 455                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
 456         if (body->valid & OBD_MD_FLTYPE)
 457                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
 458         if (body->valid & OBD_MD_FLUID)
 459                 inode->i_uid = body->uid;
 460         if (body->valid & OBD_MD_FLGID)
 461                 inode->i_gid = body->gid;
 462         if (body->valid & OBD_MD_FLFLAGS)
 463                 inode->i_flags = body->flags;
 464         if (body->valid & OBD_MD_FLNLINK)
 465                 inode->i_nlink = body->nlink;
 466         if (body->valid & OBD_MD_FLGENER)
 467                 inode->i_generation = body->generation;
 468         if (body->valid & OBD_MD_FLRDEV)
 469                 inode->i_rdev = to_kdev_t(body->rdev);
 470         if (body->valid & OBD_MD_FLSIZE)
 471                 inode->i_size = body->size;
 472 }
 473
 474 int ll_read_inode2(struct inode *inode, void *opaque)
 475 {
 476         struct ll_read_inode2_cookie *lic = opaque;
 477         struct mds_body *body = lic->lic_body;
 478         struct ll_inode_info *lli = ll_i2info(inode);
 479         int rc = 0;
 480         ENTRY;
 481
 482         sema_init(&lli->lli_open_sem, 1);
 483
 484         /* core attributes first */
 485         ll_update_inode(inode, body);
 486
 487         //if (body->valid & OBD_MD_FLEASIZE)
 488         LASSERT(!lli->lli_smd);
 489         if (lic && lic->lic_lmm)
 490                 obd_unpackmd(ll_i2obdconn(inode), &lli->lli_smd, lic->lic_lmm);
 491
 492         /* Get the authoritative file size */
 493         if (lli->lli_smd && S_ISREG(inode->i_mode)) {
 494                 rc = ll_file_size(inode, lli->lli_smd);
 495                 if (rc) {
 496                         CERROR("ll_file_size: %d\n", rc);
 497                         /* FIXME: need to somehow prevent inode creation */
 498                         LBUG();
 499                         make_bad_inode(inode);
 500                 }
 501         }
 502
 503         /* OIDEBUG(inode); */
 504
 505         if (S_ISREG(inode->i_mode)) {
 506                 inode->i_op = &ll_file_inode_operations;
 507                 inode->i_fop = &ll_file_operations;
 508                 inode->i_mapping->a_ops = &ll_aops;
 509                 EXIT;
 510         } else if (S_ISDIR(inode->i_mode)) {
 511                 inode->i_op = &ll_dir_inode_operations;
 512                 inode->i_fop = &ll_dir_operations;
 513                 inode->i_mapping->a_ops = &ll_dir_aops;
 514                 EXIT;
 515         } else if (S_ISLNK(inode->i_mode)) {
 516                 inode->i_op = &ll_fast_symlink_inode_operations;
 517                 EXIT;
 518         } else {
 519                 init_special_inode(inode, inode->i_mode,
 520                                    kdev_t_to_nr(inode->i_rdev));
 521                 EXIT;
 522         }
 523
 524         return rc;
 525 }
 526
 527 static inline void invalidate_request_list(struct list_head *req_list)
 528 {
 529         struct list_head *tmp, *n;
 530         list_for_each_safe(tmp, n, req_list) {
 531                 struct ptlrpc_request *req =
 532                         list_entry(tmp, struct ptlrpc_request, rq_list);
 533                 CERROR("invalidating req xid %d op %d to %s:%d\n",
 534                        (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 535                        req->rq_connection->c_remote_uuid,
 536                        req->rq_import->imp_client->cli_request_portal);
 537                 req->rq_flags |= PTL_RPC_FL_ERR;
 538                 wake_up(&req->rq_wait_for_rep);
 539         }
 540 }
 541
 542 void ll_umount_begin(struct super_block *sb)
 543 {
 544         struct ll_sb_info *sbi = ll_s2sbi(sb);
 545         struct list_head *ctmp;
 546
 547         ENTRY;
 548
 549         list_for_each(ctmp, &sbi->ll_conn_chain) {
 550                 struct ptlrpc_connection *conn;
 551                 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
 552
 553                 spin_lock(&conn->c_lock);
 554                 conn->c_flags |= CONN_INVALID;
 555                 invalidate_request_list(&conn->c_sending_head);
 556                 invalidate_request_list(&conn->c_delayed_head);
 557                 spin_unlock(&conn->c_lock);
 558         }
 559
 560         EXIT;
 561 }
 562
 563
 564 static kmem_cache_t *ll_inode_cachep;
 565
 566 static struct inode *ll_alloc_inode(struct super_block *sb)
 567 {
 568         struct ll_inode_info *lli;
 569         lli = kmem_cache_alloc(ll_inode_cachep, SLAB_KERNEL);
 570         if (!lli)
 571                 return NULL;
 572
 573         memset(lli, 0, (char *)&lli->lli_vfs_inode - (char *)lli);
 574         sema_init(&lli->lli_open_sem, 1);
 575
 576         return &lli->lli_vfs_inode;
 577 }
 578
 579 static void ll_destroy_inode(struct inode *inode)
 580 {
 581         kmem_cache_free(ll_inode_cachep, ll_i2info(inode));
 582 }
 583
 584 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
 585 {
 586         struct ll_inode_info *lli = foo;
 587
 588         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
 589             SLAB_CTOR_CONSTRUCTOR)
 590                 inode_init_once(&lli->lli_vfs_inode);
 591 }
 592
 593 int ll_init_inodecache(void)
 594 {
 595         ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
 596                                             sizeof(struct ll_inode_info),
 597                                             0, SLAB_HWCACHE_ALIGN,
 598                                             init_once, NULL);
 599         if (ll_inode_cachep == NULL)
 600                 return -ENOMEM;
 601         return 0;
 602 }
 603
 604 void ll_destroy_inodecache(void)
 605 {
 606         if (kmem_cache_destroy(ll_inode_cachep))
 607                 CERROR("ll_inode_cache: not all structures were freed\n");
 608 }
 609
 610
 611
 612 /* exported operations */
 613 struct super_operations ll_super_operations =
 614 {
 615         alloc_inode: ll_alloc_inode,
 616         destroy_inode: ll_destroy_inode,
 617         clear_inode: ll_clear_inode,
 618         delete_inode: ll_delete_inode,
 619         put_super: ll_put_super,
 620         statfs: ll_statfs,
 621         umount_begin: ll_umount_begin
 622 };
 623
 624 struct file_system_type lustre_lite_fs_type = {
 625         .owner  = THIS_MODULE,
 626         .name =   "lustre_lite",
 627         .get_sb = ll_get_sb,
 628         .kill_sb = kill_litter_super,
 629 };
 630
 631 static int __init init_lustre_lite(void)
 632 {
 633         int rc;
 634         printk(KERN_INFO "Lustre Lite 0.5.14, info@clusterfs.com\n");
 635         rc = ll_init_inodecache();
 636         if (rc)
 637                 return -ENOMEM;
 638         ll_file_data_slab = kmem_cache_create("ll_file_data",
 639                                               sizeof(struct ll_file_data), 0,
 640                                               SLAB_HWCACHE_ALIGN, NULL, NULL);
 641         if (ll_file_data_slab == NULL) {
 642                 ll_destroy_inodecache();
 643                 return -ENOMEM;
 644         }
 645         return register_filesystem(&lustre_lite_fs_type);
 646 }
 647
 648 static void __exit exit_lustre_lite(void)
 649 {
 650         unregister_filesystem(&lustre_lite_fs_type);
 651         ll_destroy_inodecache();
 652         kmem_cache_destroy(ll_file_data_slab);
 653 }
 654
 655 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 656 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
 657 MODULE_LICENSE("GPL");
 658
 659 module_init(init_lustre_lite);
 660 module_exit(exit_lustre_lite);
 661 #endif